tmux資源收集

https://larrylu.blog/tmux-33a24e595fbc
基本介紹

https://github.com/gpakosz/.tmux
把介面弄得很漂亮

https://github.com/rothgar/awesome-tmux
一堆awesome

用python的regular expression做文字取代

https://docs.python.org/3/library/re.html#re.sub

把 \ 之前的文字全部刪除

re.sub(r'^\S* \\ ', '',the_string)

在單引號之前的r但表單引號裡面的字串是regular expression

^ 是match字串的開頭

\S是match非空白的字元

*是只match前面的東西(\S)0到任意個

\\前面的\是跳脫字元，用來跳脫後面的字元\，後面的\被跳脫後就是指\本身了，用來match \。若沒跳脫的話(如前面的\)就會發揮他在reqular expression的作用(跳脫後面的字元)

----------

*

Causes the resulting RE to match 0 or more repetitions of the preceding RE, as many repetitions as are possible. ab* will match ‘a’, ‘ab’, or ‘a’ followed by any number of ‘b’s.

\S

Matches any character which is not a whitespace character. This is the opposite of \s. If the ASCII flag is used this becomes the equivalent of [^ \t\n\r\f\v].

Gatsby製作Blog

https://www.gatsbyjs.org/docs/adding-a-list-of-markdown-blog-posts/
https://codinghero.netlify.com/

定時排程刪除超過一定天數的檔案

https://softwareengineering.stackexchange.com/questions/149824/automatically-delete-files-after-they-expire
https://superuser.com/questions/1072679/bash-what-does-means
http://linux.vbird.org/linux_basic/0430cron.php

find $search_path -atime +3 -exec rm {} \;

加到crontab裡面
# crontab -e

{}的意思就是find輸出的結果會帶到rm的參數，\;是確保command結束符號，可用+取代

pyenv-win 安裝與移除

https://github.com/pyenv-win/pyenv-win

1. Install
pip install pyenv-win --target %USERPROFILE%/.pyenv

2. Add following to PATH enviroment variable
%USERPROFILE%\.pyenv\pyenv-win\bin;%USERPROFILE%\.pyenv\pyenv-win\shims;

3. Add installed path in file easy_install.pth to site-packages folder(ex: C:\Users\Jack_Lin\AppData\Local\Programs\Python\Python37-32\Lib\site-packages).
Need to add absolute path, ex:
C:\Users\Jack_Lin\.pyenv in file easy_install.pth

4. pip list to check pyenv-win is installed and recognize by pip

5. upgrade
pip install --upgrade pyenv-win

6. uninstall
pip uninstall pyenv-win

如何push本地branch並覆蓋remote branch

git push -f --set-upstream origin master
git push -f  要小心使用

Scrapy學習筆記

若要整合Django和Scrapy，可利用DjangoItem，可節省定義Item的部分，讓Scrapy的Item定義自動去參照Django model，也可在Item增加欄位。

ItemLoader的部分，預設add_value後，postprocessor都會以list為最後輸出結果，可更感post processor為TakeFirst。

在Pipeline裡，若應用到DjangoItem，要先save後，在以Django model來操作 Foreign Key或是ManyToManyField部分。DjangoItem無法直接取得Django model內容。DjangoItem只是取去參考Django model，省去寫 field_xxx = scrapy.Field()而已。